Pipe holder



July 2, 1929.

Filed June 14, 1926 2 Sheets-Sheet 1 Zlwuentoz July 2, 1929.

M. w. CARROLL PIPEHOLDER Filed June 14, 1926 2 Sheets-Sheet 2 v Jnucntoz Patented July 2, 1929.

' -YU'NITLED7FSTATE1S [PATENT for rice.

Mormon weenaonn; or antimony waxes Application filed June 14,

This invention relatesto new and useful imsrovements in a pipe holder.

Another object of the invention is to rovide a pipe holder of the character descri ed, having pipe engaging jaws equipped with roller bearings adapted .to contact with the seat of said. slip ring to prevent the jaws from sticking therein, to the end that the slips may be more easily removed.

A further feature of the invention resides in a novel cage-like structure wherein. the jaws are mounted, as well as the novel t pe of slip ring havin the internal tracks against which the roller arin s of the jaws work, as well as the meansor holding the slips against rotation in said ring.

With the aboveand other objects in view this invention has particular re ation to certain novel features of construction, operation and arrangement 'of parts, an exam le of which is given in this specification an illustrated in the accompanying drawings, wherein 1 Figure 1 shows a plan view of-the device.

Figure 2 shows a transverse sectional view taken on the line 2-2 of Figure'3.

Figure 3 shows a vertical sectional-view taken on the line 33 of'Figure 2, and

Figure 4 shows a sectional view taken on the line 4- 1 of Figure 2.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral 1 designates the slip ring, adapted to seat in the opening of a rotary table, and having the internal downwardly converging wall 2, with the vertical tracks 3 secured thereto and spaced apart therearound. Fastened to opposite sides of this wall 2 are the guides 4, 4, whose inner sides have the lengthwise dovetailed coves 5, 5.

The pipe holding'slip is composed of a plurality of sections 6, 6, preferably two in number. Each section includes a cage as 7, and jaws, as 8, mounted in the cage. The'cage of each section is preferably cast as a unit and has the spaced, radial slots 9 therein to receive the jaws 8. These slots are preferably recpendently.

ices. Serial m. 115,712.:

tangular both in vertical,'-a's well,- as in cross sectional contour, and the "aws 8 are of a form 'to fitsnugly throu 'h sai radially therein.-

between said slots, is cored out, as much as possible to conducetolightness but not to.

slots, but to move The material of the cage,

sacrifice the strength of the cage. Each jaw has a transverse rivet 10 with a projecting'enlarged head 11 which works-in aradial slot 12'in the adjacent wall of the cage and the outer ends of these slots 12'are closed by the thin metal plates 13 which are fastened to the cage between the jaws. I p Each cage 7 has an exterior, verticalrtenon 14 adapted to, fit into the corresponding groove 5 to hold the jaws in alignment with the corresponding tracks -3, as well as to prevent the slips from turning in the ring 1.- Theouter sides of the jaws 8 taper inward- 1y to conform. tothe ta r of the inner wall 2 ofthe slip' ring, and ave the anti-friction bearings '15 "which ride on the corresponding tracks so'that the aws willsecurely grip-the pipe and said bearmgs'pre'vent the slips from wedging sotightly around the pi to be held that their removal will be difiicu t. Some 7.

of the other jaws are formed to engage the pipe and hold it sus ended in a well ore.

Each section of t e slip is provided, with.

a .suitable handle, or ball, 17 by means of which theslip sections may be handled inde- What I-claim is i i I V 1. A pipe holding slip formed-of a, plurality of sections, each section including a cage having slots extending therethrough radially 11nd radially movable'jaws mounted'in said.-

slots. a 7 2. A pipe holdingslip formed of a plurality of independent sections, each section includ- I ing a cage havin slots which extend entirely therethrough ra' ially, radially movable jaws mounted in said slots, the inner edges of some ,of said jaws having vertical teeth. 1

3. A-pipe holding slip formed ofa plurality of sections, each section including a cage having a plurality-of slots which extend entirely therethrough'radially and pipe engaging jaws mounted to move radially 1n said slots.

4. In a pipe holding slipan-arcuate'cage having radialslots, mounted in said slots a pi e on aging jaws d antiriction bearings carried said aws.

ring and including: jaws whose outer faces bearagainst said respective bearing surfaces. 6. A pipe-holder ncludmg'a slip ring, a

- plurality of spaced tracks carried therein and having downwardly converging bearing sur-' iaces, a pipe holding slip ada ted to be mounted in said ring and inelu ing jaws whose outer faces'bear against said respective. hearing surfaces and means preventing the rotation of said slip relative to said rin 7. A pipe holder including a slip ring having a downwardly convergingv inside wall, spaced tracks carried by said wall, a slip having a plurality of radially movable jaws aligned with said tracks. y Y

" 8. A pipeholder including a'slip ring havtracks carried. by the inner wall thereof and. havingIdgwnwardly conver ing bearing surfaces; a pipe holding slip a apted to be mounted in said mg a downwardly conver ing inside wall,

spaced tracks carr ed by sai wall, a slip having. a' plurality of radially movable jaws aligned with said track's,ianti-friction bear- "in'gs mounted in said jaws and bearing against said tracks. p

' I 9. A pipe holder including a slip ring having a downwardly converging inside wall,

spaced tracks carried by and pi'ojecting'inwardly from said wall, a slip having a plurality of radially movable jaws aligned with I .said tracks and"me'ans maintaining such alignment.

10. A pipe holder including a slip ring hava ing a downwardly converging inside seat, a slip formed of a plurality of sections and adapted to seat in said seat, each section having radially movable jaws and antifriction hearings mounted in said jaws and bearing against said scat.

In testimony whereof'I have signed my name to this specification.

MONROE W. CARROLL. 

